Support road.cc

Like this site? Help us to make it better.

forum
road.cc bike forum

Carbon assembly paste

by Johnnyvee
Sat, May 05, 2018 20:48
8

Is it necessary? 

Had to fit longer seat post to bike following bike fit and both frame and post are carbon. I've dry fitted it for now as I thought I had some assembly paste turns out it's anti sieze paste. 

Or will something else do?

Cheers,

J.

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

Add new comment

8 comments

Avatar
Johnnyvee | 6 years ago
0 likes

Thanks for the replies fellow riders.

There's no slipping at the mo and I've got it set to the right torque however I will get some as I don't like the idea of it being left dry.

Cheers,

J.

Avatar
sergius | 6 years ago
0 likes

Buy a tube of the carbon assembly paste - it will last a lifetime for most people.

Avatar
StraelGuy | 6 years ago
0 likes

I've done alot of research on grease and carbon fibre and the general consensus is that it doesn't affect carbon fibre negatively at all. Having said that, I'd still use carbon paste because it's the gritty bits in it that stop the seatpost slipping.

Avatar
Pilot Pete | 6 years ago
0 likes

Just buy a tube/ tub of the right stuff, don’t try a bodge. I’ve read that carbon can absorb some greases etc and swell the fibres, so not exactly ideal for a seatpost! You would be better leaving it dry until you get the right stuff as long as it is not slipping.

PP

Avatar
turnerjohn replied to Pilot Pete | 6 years ago
0 likes

Pilot Pete wrote:

. I’ve read that carbon can absorb some greases etc and swell the fibres,

PP

the substance would need to get through the resin first before it had contact with the carbon....or is that what your meaning ? Never heard of that issue....am curious ! Degreaser and other detergents seem fine on carbon components and they're more corrosive 

 

Avatar
hawkinspeter replied to turnerjohn | 6 years ago
2 likes

turnerjohn wrote:

Pilot Pete wrote:

. I’ve read that carbon can absorb some greases etc and swell the fibres,

PP

the substance would need to get through the resin first before it had contact with the carbon....or is that what your meaning ? Never heard of that issue....am curious ! Degreaser and other detergents seem fine on carbon components and they're more corrosive 

From http://forums.roadbikereview.com/components-wrenching/fyi-grease-carbon-...

Quote:

No grease on carbon posts. Grease contains certain minerals that can attack clear coats, can penetrate the resin matrix and could cause swelling of the composite laminate. Can you say "stuck seat post?" Don't use grease.
John G. Harrington
Vice president, bicycle products
Easton Sports, Inc.

It's difficult to say which greases may or may not cause a problem without trying it out and then discovering the issue a year or so later, so I'm firmly in the clean it and use carbon assembly paste camp. Degreasers and detergents probably don't stay in contact with the carbon long enough to cause any issues.

Avatar
AfterPeak | 6 years ago
3 likes

Main purpose I think is that it allows you to reduce the torque required meaning no chance of you busting your lovely carbon components. Also serves as antiseize agent.

Avatar
Canyon48 | 6 years ago
0 likes

Definitely needed, stops seatposts slipping!

Latest Comments